CVE-2026-3800
Published: 09 March 2026
Summary
CVE-2026-3800 is a medium-severity Improper Access Control (CWE-284) vulnerability in Oretnom23 Resort Reservation System. Its CVSS base score is 5.3 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 21.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2026-3800 is a vulnerability in SourceCodester/janobe Resort Reservation System 1.0 that enables unrestricted file upload. The issue resides in the doInsert function of the file /controller.php?action=add, where manipulation of the image argument allows attackers to upload files without restrictions. It is associated with CWEs-284 (Improper Access Control) and CWE-434 (Unrestricted Upload of File with Dangerous Type), and carries a CVSS v3.1 base score of 6.3.
The vulnerability is exploitable remotely over the network with low attack complexity and no user interaction required. Exploitation demands low privileges (PR:L) from the attacker, resulting in low impacts to confidentiality, integrity, and availability in an unchanged scope (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L). A successful attack allows unauthorized file uploads, potentially enabling further compromise depending on the uploaded content.
Advisories referenced in VulDB entries (ctiid.349767, id.349767, submit.768978, submit.768998) and a GitHub disclosure at xiahao90/CVEproject detail the vulnerability, with the exploit publicly available and noted as usable. No specific patches or mitigations are described in the provided information.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-10291
Vulnerability details
A vulnerability has been found in SourceCodester/janobe Resort Reservation System 1.0. Affected is the function doInsert of the file /controller.php?action=add. Such manipulation of the argument image leads to unrestricted upload. The attack can be executed remotely. The exploit has been…
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disclosed to the public and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unrestricted file upload in public-facing PHP web app directly enables remote exploitation for initial access (T1190) and facilitates arbitrary web shell deployment for persistence (T1505.003).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation of the image argument in doInsert to reject dangerous file types, blocking the unrestricted upload root cause.
Enforces access-control policy on file-upload operations so that only permitted, safe content can be written via controller.php?action=add.
Deploys malicious-code detection mechanisms that can inspect and block the dangerous files an attacker uploads through the vulnerable function.